CN111023412A - Refrigerant filling device and method - Google Patents
Refrigerant filling device and method Download PDFInfo
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- CN111023412A CN111023412A CN201911298636.8A CN201911298636A CN111023412A CN 111023412 A CN111023412 A CN 111023412A CN 201911298636 A CN201911298636 A CN 201911298636A CN 111023412 A CN111023412 A CN 111023412A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/85—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B45/00—Arrangements for charging or discharging refrigerant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a device and a method for filling a refrigerant. The device comprises: a refrigerant storage tank (1) for storing a refrigerant; a first temperature sensor (2) for detecting an actual discharge temperature of the compressor; a controller (3) for generating a control instruction according to the target exhaust temperature and the actual exhaust temperature; and the electromagnetic valve (4) is used for adding the refrigerant into the air conditioning unit according to the control instruction or stopping adding the refrigerant into the air conditioning unit according to the control instruction. The refrigerant filling is automatically controlled according to the exhaust temperature, so that the filling accuracy is ensured, and the volume and the weight of the filling device are reduced.
Description
Technical Field
The disclosure relates to the technical field of air conditioners, in particular to a refrigerant filling device and a refrigerant filling method.
Background
With the development of society, the use amount of air conditioners rises year by year, the after-sale maintenance quantity of the air conditioners is larger and larger, and the filling of refrigerants into the air conditioners is common work in the after-sale maintenance of the air conditioners. Inaccurate filling amount of the air conditioner refrigerant can increase the energy efficiency of the air conditioner, affect the use effect of the air conditioner, and even cause the air conditioner to break down, damage, explode and the like. When a maintenance master fills the refrigerant into the air conditioner, the refrigerant filling amount is generally judged by experience, the filling error is large and uncontrollable, and potential safety hazards exist. The refrigerant filling machine can realize accurate filling, but the filling machine has larger volume and heavier weight and is difficult to be used for after-sale maintenance.
Therefore, how to reduce the volume and weight of the filling device while ensuring the filling accuracy is a concern of researchers at present.
Disclosure of Invention
The problem that this disclosure solved is how to reduce filling device's volume and weight when guaranteeing the filling precision.
To solve the above problems, an aspect of the present disclosure provides a refrigerant filling device, including: a refrigerant storage tank 1 for storing a refrigerant; a first temperature sensor 2 for detecting an actual discharge temperature of the compressor; the controller 3 is used for generating a control instruction according to a target exhaust temperature and the actual exhaust temperature; and the electromagnetic valve 4 is used for adding the refrigerant in the refrigerant storage tank 1 into the air conditioning unit according to the control instruction, or stopping adding the refrigerant in the refrigerant storage tank 1 into the air conditioning unit according to the control instruction.
Therefore, the controller judges whether the refrigerant is added into the air conditioning unit or not according to the exhaust temperature of the compressor, generates a corresponding control instruction and controls the electromagnetic valve to be opened and closed, so that the refrigerant filling is automatically controlled, and the refrigerant filling accuracy is improved. In addition, the components in the device are small in size and light in weight, and the size and the weight of the filling device are reduced.
Optionally, the apparatus further comprises: a second temperature sensor 5 for detecting an outdoor ambient temperature; a third temperature sensor 6 for detecting an indoor ambient temperature; the controller 3 is also configured to calculate the target exhaust temperature based on the outdoor ambient temperature and the indoor ambient temperature.
Optionally, the controller 3 is further configured to calculate the target exhaust temperature according to the outdoor ambient temperature and the indoor ambient temperature by using a preset fitting function.
Therefore, the current target exhaust temperature is calculated in real time by using a preset fitting function according to the currently detected indoor environment temperature and outdoor environment temperature, and the accuracy and the reasonability of the refrigerant filling judgment basis are further improved.
Optionally, the apparatus further comprises: a first pressure sensor 7 for detecting a first pressure in the refrigerant storage tank 1; the controller 3 is further configured to determine whether the first pressure is within a preset range.
Therefore, the content of the refrigerant in the refrigerant storage tank is judged by detecting the pressure in the refrigerant storage tank, and whether the refrigerant in the refrigerant storage tank meets the filling requirement or not can be simply and accurately judged.
Optionally, the apparatus further comprises: a display 8; when the first pressure is not within the preset range, the controller 3 is further configured to control the display 8 to display corresponding warning information.
Therefore, when the content of the refrigerant in the refrigerant storage tank does not meet the filling requirement, alarm information is generated to remind an operator, and the safety of refrigerant filling is improved.
Optionally, the apparatus further comprises: a booster pump 9; a second pressure sensor 10 for detecting a second pressure at a filling point of the air conditioning unit; when the first pressure is not greater than the second pressure, the controller 3 is further configured to turn on the booster pump 9 to increase the pressure of the refrigerant introduced into the air conditioning unit.
Therefore, when the pressure in the refrigerant storage tank is smaller than the pressure at the filling position, the refrigerant filling pressure is increased, and the normal operation of refrigerant filling is ensured.
Optionally, the first temperature sensor 2 is disposed on an outer wall of an outdoor unit discharge pipe of the air conditioning unit.
Therefore, on the basis of ensuring the detection accuracy of the exhaust temperature, the first temperature sensor is easy to install.
In another aspect, the present disclosure provides a method of filling a refrigerant, the method including: detecting an actual discharge temperature of the compressor; and adding a refrigerant into the air conditioning unit according to the target exhaust temperature and the actual exhaust temperature, or stopping adding the refrigerant into the air conditioning unit according to the target exhaust temperature and the actual exhaust temperature.
Optionally, the method further comprises: detecting an outdoor ambient temperature and an indoor ambient temperature; and calculating the target exhaust temperature according to the outdoor environment temperature and the indoor environment temperature.
Optionally, the method further comprises: it is determined whether a pressure in a refrigerant storage tank supplying the refrigerant is within a preset range.
The refrigerant filling method has the same advantages of the refrigerant filling device compared with the prior art, and the detailed description is omitted.
Drawings
Fig. 1 is a block diagram of a refrigerant filling apparatus according to an embodiment of the present disclosure;
fig. 2 is a flowchart illustrating an operation of a refrigerant filling apparatus according to an embodiment of the present disclosure;
fig. 3 is a flowchart of a refrigerant filling method according to an embodiment of the disclosure.
Description of reference numerals:
1-a refrigerant storage tank; 2-a first temperature sensor; 3-a controller; 4-an electromagnetic valve; 5-a second temperature sensor; 6-a third temperature sensor; 7-a first pressure sensor; 8-a display; 9-a booster pump; 10-second pressure sensor.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 1 is a block diagram of a refrigerant filling device according to an embodiment of the present disclosure. Next, referring to fig. 1, the refrigerant charging device of the present disclosure will be described in detail by four specific embodiments.
The first embodiment is as follows:
the present embodiment provides a refrigerant charging device including a refrigerant storage tank 1, a first temperature sensor 2, a controller 3, and an electromagnetic valve 4. The first temperature sensor 2 and the electromagnetic valve 4 are both connected to the controller 3, and the electromagnetic valve 4 connects the refrigerant storage tank 1 and the air conditioning unit.
The refrigerant storage tank 1 is used to store a refrigerant, which is the same kind as that used for the air conditioner to be charged.
The first temperature sensor 2 is used to detect the actual discharge temperature of the compressor of the air conditioner to be filled. The first temperature sensor 2 is arranged on the outer wall of an exhaust pipe of an outdoor unit of the air conditioning unit. The compressor exhaust temperature is a key index reflecting the running state of the air conditioner, and the refrigerant filling amount of the air conditioner is determined according to the compressor exhaust temperature in the embodiment, so that the refrigerant filling accuracy is guaranteed.
The controller 3 is configured to generate a control command according to the target exhaust gas temperature and the actual exhaust gas temperature detected by the first temperature sensor 2. In the present embodiment, the target exhaust gas temperature is, for example, a reference temperature generated in advance by the controller 3, and the control command is, for example, a filling control command or a filling stop control command. When the actual exhaust temperature is greater than the target exhaust temperature, the controller 3 generates a filling control command to turn on the solenoid valve 4, and when the actual exhaust temperature is equal to the target exhaust temperature, the controller 3 generates a stopping filling control command to turn off the solenoid valve 4.
The electromagnetic valve 4 is used for adding the refrigerant in the refrigerant storage tank 1 into the air conditioning unit according to a control instruction, or stopping adding the refrigerant in the refrigerant storage tank 1 into the air conditioning unit according to the control instruction. In this embodiment, for example, when the actual exhaust temperature is greater than the target exhaust temperature, the control instruction is a charging control instruction, the electromagnetic valve 4 is turned on, and the refrigerant in the refrigerant storage tank 1 is charged into the air conditioning unit through the electromagnetic valve 4; for example, when the actual exhaust temperature is equal to the target exhaust temperature, the control command is a filling stop control command, the solenoid valve 4 is turned off, and the refrigerant is stopped from being added to the air conditioning unit.
According to the refrigerant filling device provided by the embodiment, the controller judges whether to add the refrigerant into the air conditioning unit or not according to the exhaust temperature of the compressor, generates the corresponding control instruction and controls the electromagnetic valve to be opened and closed, so that the refrigerant filling is automatically controlled, and the refrigerant filling accuracy is improved. Besides the refrigerant storage tank 1, the first temperature sensor 2, the controller 3 and the electromagnetic valve 4 are small in size and light in weight, so that the size and the weight of the filling device are reduced, the filling device is convenient to carry, and the filling device is more suitable for after-sales maintenance. The first temperature sensor 2 is placed on the outer wall of the outdoor unit exhaust pipe, so that the exhaust temperature can be directly measured, the installation is easy, and the operation is simple.
Example two:
the present embodiment provides a refrigerant filling device, which further includes a second temperature sensor 5 and a third temperature sensor 6, compared to the refrigerant filling device provided in the first embodiment.
The second temperature sensor 5 is used to detect the outdoor ambient temperature. The second temperature sensor 5 is placed, for example, on the air inlet side of the outdoor unit of the air conditioning unit.
The third temperature sensor 6 is used to detect the indoor ambient temperature. The third temperature sensor 6 is placed, for example, at the return air inlet of the indoor unit of the air conditioning unit.
The controller 3 is configured to calculate a target exhaust temperature according to the outdoor ambient temperature detected by the second temperature sensor 5 and the indoor ambient temperature detected by the third temperature sensor 6 by using a preset fitting function, and generate a control command according to the calculated target exhaust temperature and the actual exhaust temperature detected by the first temperature sensor 2.
In this embodiment, the controller 3 is preset with a fitting function relation between the target discharge temperature of the compressor and the outdoor ambient temperature and the indoor ambient temperature, the fitting function relation is obtained by fitting according to a large amount of known experimental test data, and the fitting function is, for example:
T0＝a+b×T2+c×T3
wherein, T0Is a target exhaust temperature, T2Is the outdoor ambient temperature, T3The indoor environment temperature is defined as a, b and c are constants, b is a proportionality coefficient corresponding to the outdoor environment temperature, and c is a proportionality coefficient corresponding to the indoor environment temperature. In this embodiment, different refrigerant types or different operation modes of the air conditioning unit correspond to different values a, b, and c, and the controller 3 determines a corresponding fitting function according to the operation mode of the air conditioning unit to be currently charged and the type of the refrigerant to be charged, so as to calculate the target exhaust temperature.
In this embodiment, the second temperature sensor 5 and the third temperature sensor 6 are added to the refrigerant filling device in the first embodiment to respectively detect the outdoor ambient temperature and the indoor ambient temperature, so that the controller 3 calculates the current target exhaust temperature in real time according to the currently detected outdoor ambient temperature and indoor ambient temperature, and the accuracy and the rationality of the refrigerant filling judgment basis are further improved.
Example three:
the present embodiment provides a refrigerant filling device, which further includes a first pressure sensor 7 and a display 8, compared to the refrigerant filling device provided in the first embodiment. The first pressure sensor 7 and the display 8 are both connected to the controller 3.
The first pressure sensor 7 is used to detect a first pressure in the refrigerant storage tank 1 and send the detected first pressure to the controller 3. The first pressure sensor 7 is provided in the refrigerant storage tank 1, for example.
The controller 3 is also configured to determine whether the first pressure is within a predetermined range. In the present embodiment, the controller 3 stores, for example, an upper limit value P of the pressure in the refrigerant storage tank 1 in advancemaxAnd a lower pressure limit value PminThe predetermined range is (P)min，Pmax)。PminFor ensuring proper operation of the refrigerant tank 1Minimum pressure, PmaxMaximum pressure, P, to ensure safe operation of the refrigerant reservoir 1min、PmaxIs related to the type of refrigerant, and PmaxThe size of (b) is also related to the pressure-resistant capacity of the refrigerant storage tank 1. When P is presentminFirst pressure < PmaxWhen the pressure in the refrigerant storage tank 1 is in the preset range, the refrigerant in the refrigerant storage tank meets the filling requirement, otherwise, the pressure in the refrigerant storage tank 1 is not in the preset range, and the refrigerant in the refrigerant storage tank does not meet the filling requirement.
In this embodiment, when the first pressure is not within the preset range, the controller 3 is further configured to control the display 8 to display corresponding warning information. Specifically, the first pressure is not less than PmaxWhen the pressure of the refrigerant is over high, the controller 3 controls the display 8 to display alarm information such as 'pressure over high', and reminds an operator to open a stop valve on the refrigerant storage tank 1 to release the pressure, so that safety accidents are avoided; the first pressure is less than or equal to PminWhen the refrigerant is filled, the controller 3 controls the display 8 to display warning information such as 'low pressure' and the like, so that an operator is reminded to supplement the refrigerant into the refrigerant storage tank 1, and normal filling is guaranteed. Further, the display 8 may also display the first pressure.
In the embodiment, the first pressure sensor 7 and the display 8 are added to the refrigerant filling device in the first embodiment, whether the refrigerant content in the refrigerant storage tank 1 meets the filling requirement is judged according to the pressure in the refrigerant storage tank 1, and an alarm message is generated when the refrigerant content does not meet the filling requirement to remind an operator to replenish the refrigerant or release the pressure, so that the safety of the refrigerant filling device is improved.
Example four:
the present embodiment provides a refrigerant filling apparatus, which further includes a first pressure sensor 7, a booster pump 9, and a second pressure sensor 10, compared to the refrigerant filling apparatus provided in the first embodiment. The first pressure sensor 7 and the second pressure sensor 10 are both connected to the controller 8, and the refrigerant storage tank 1, the booster pump 9, the electromagnetic valve 4 and the air conditioning unit are sequentially connected.
The first pressure sensor 7 is used to detect a first pressure in the refrigerant storage tank 1 and send the detected first pressure to the controller 3. The first pressure sensor 7 is provided in the refrigerant storage tank 1, for example.
The second pressure sensor 10 is configured to detect a second pressure at the filling point of the air conditioning unit and send the detected second pressure to the controller 3. The second pressure sensor is arranged, for example, downstream of the solenoid valve 4.
In this embodiment, when the first pressure is higher than the second pressure, the booster pump 9 does not need to be started; when the first pressure is not greater than the second pressure, i.e. the first pressure is not greater than the second pressure, the controller 3 is further configured to turn on the booster pump 9.
In the present embodiment, the first pressure sensor 7, the booster pump 9 and the second pressure sensor 10 are added to the refrigerant filling device in the first embodiment, so that when the pressure at the filling position of the air conditioning unit is greater than the pressure in the refrigerant storage tank 1, the booster pump 9 is turned on to increase the pressure of the refrigerant added to the air conditioning unit, thereby ensuring the normal operation of refrigerant filling.
Example five:
the embodiment provides a refrigerant filling device and a working method thereof. The refrigerant filling device of this embodiment includes components such as a refrigerant storage tank 1, a first temperature sensor 2, a controller 3, a solenoid valve 4, a second temperature sensor 5, a third temperature sensor 6, a first pressure sensor 7, a display 8, a booster pump 9, and a second pressure sensor 10, and the working principle of each component is the same as that of the corresponding component in the first to fourth embodiments, and details are not repeated here.
Referring to fig. 2, the operation of the refrigerant charging device of fig. 1 will be described in detail. As shown in fig. 2, the operation of the refrigerant charging device includes operation S210 to operation S290.
In operation S210, the type of refrigerant in the refrigerant storage tank 1 is determined.
Specifically, according to the type of the refrigerant used by the air conditioning unit to be charged, the type of the refrigerant in the refrigerant storage tank 1 is determined to be the same as the type of the refrigerant used by the air conditioning unit to be charged.
In operation S220, it is determined whether the first pressure in the refrigerant storage tank 1 is within a preset range.
Specifically, a first pressure in the refrigerant storage tank 1 is detected using the first pressure sensor 7 and the detected first pressure is transmitted to the controller 3, and the controller 3 determines whether the first pressure is within a preset range, performs operation S230 when the first pressure is not within the preset range, and otherwise performs operation S240.
In operation S230, an alarm message is generated.
Specifically, the controller 3 controls the display 8 to generate an alarm message to prompt an operator to supplement the refrigerant into the refrigerant storage tank 1 or open the stop valve to release the pressure according to the alarm message until the first pressure is within the preset range.
In operation S240, an operation mode of the refrigerant filling device is set.
Specifically, an operation mode (for example, a cooling mode or a heating mode) of the air conditioner to be filled is selected according to the current indoor ambient temperature, and the operation mode of the refrigerant filling device is set so that the operation modes of the refrigerant filling device and the air conditioner to be filled are the same.
And operation S250, continuously judging whether the first pressure is greater than a second pressure at the filling position of the air conditioning unit.
Specifically, the second pressure at the filling position of the air conditioning unit is detected by using the second pressure sensor 10, the detected second pressure is sent to the controller 3, the controller 3 continuously judges whether the first pressure is greater than the second pressure, when the first pressure is not greater than the second pressure, operation S260 is executed, otherwise, operation S270 is executed.
In operation S260, the booster pump 9 is turned on. Specifically, the booster pump 9 is turned on, ensuring that the sum of the pressure generated by the booster pump 9 and the first pressure is greater than the second pressure.
In operation S270, it is determined whether the actual exhaust temperature is greater than the target exhaust temperature.
Specifically, the actual exhaust temperature, the outdoor ambient temperature and the indoor ambient temperature of the compressor unit are detected by using a first temperature sensor 2, a second temperature sensor 5 and a third temperature sensor 6 respectively; the controller 3 calculates a target discharge temperature from the outdoor ambient temperature and the indoor ambient temperature using a preset fitting function, compares the actual discharge temperature with the target discharge temperature, and performs operation S280 when the actual discharge temperature is greater than the target discharge temperature and performs operation S290 when the actual discharge temperature is equal to the target discharge temperature.
In operation S280, the refrigerant in the refrigerant storage tank 1 is added to the air conditioning unit.
Specifically, the controller 3 turns on the solenoid valve 4 to add the refrigerant in the refrigerant storage tank 1 to the air conditioning unit until the actual discharge temperature is equal to the target discharge temperature.
In operation S290, the addition of the refrigerant in the refrigerant storage tank 1 to the air conditioning unit is stopped.
Specifically, the controller 3 turns off the electromagnetic valve 4 to stop adding the refrigerant in the refrigerant storage tank 1 into the air conditioning unit, and enables the air conditioning unit to operate for 5min, so as to ensure that the air conditioner operates stably after the refrigerant is added.
Example six:
the present embodiment provides a refrigerant charging method. Referring to fig. 3, the method includes operations S310-S320.
In operation S310, an actual discharge temperature of the compressor is detected.
In this embodiment, a temperature sensor may be disposed on an outer wall of an outdoor unit discharge pipe of the air conditioning unit to detect an actual discharge temperature of the compressor, or another method may be used to detect the actual discharge temperature of the compressor, for example, a thermocouple is used to detect the actual discharge temperature.
In the present embodiment, it should be further determined whether the pressure in the refrigerant storage tank supplying the refrigerant is within a preset range before performing operation S320. Further, when the pressure in the refrigerant storage tank is within a preset range, the content of the refrigerant in the refrigerant storage tank meets the filling requirement; otherwise, the content of the refrigerant in the refrigerant storage tank does not meet the filling requirement, and the refrigerant needs to be supplemented into the refrigerant storage tank or decompressed, so that the pressure in the refrigerant storage tank is ensured to be within a preset range.
And operation S320, adding the refrigerant to the air conditioning unit according to the target exhaust temperature and the actual exhaust temperature, or stopping adding the refrigerant to the air conditioning unit according to the target exhaust temperature and the actual exhaust temperature.
In this embodiment, the outdoor ambient temperature and the indoor ambient temperature may also be detected, and the target exhaust temperature may be calculated according to the detected outdoor ambient temperature and the detected indoor ambient temperature. Further, the preset fitting function is used to calculate the target exhaust temperature according to the detected outdoor environment temperature and indoor environment temperature, and the calculation principle is the same as that in the second embodiment, and is not repeated here.
Specifically, when the actual exhaust temperature is greater than the target exhaust temperature, adding a refrigerant to the air conditioning unit; and stopping adding the refrigerant to the air conditioning unit when the actual exhaust temperature is equal to the target exhaust temperature.
In summary, the refrigerant filling device and the method provided by the embodiment of the disclosure judge whether to add the refrigerant to the air conditioning unit according to the exhaust temperature of the compressor, automatically control the refrigerant filling by using the control instruction, improve the refrigerant filling accuracy, calculate the current target exhaust temperature in real time to serve as a judgment standard, further improve the accuracy and rationality of the judgment basis for the refrigerant filling, and generate the alarm information to remind the operator when the refrigerant content in the refrigerant storage tank does not meet the filling requirement, thereby improving the safety of the refrigerant filling. In addition, the components in the refrigerant filling device provided by the embodiment of the disclosure are small in size and light in weight, and the size and the weight of the filling device are reduced.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A refrigerant charging apparatus, comprising:
a refrigerant storage tank (1) for storing a refrigerant;
a first temperature sensor (2) for detecting an actual discharge temperature of the compressor;
a controller (3) for generating a control command according to a target exhaust temperature and the actual exhaust temperature;
and the electromagnetic valve (4) is used for adding the refrigerant in the refrigerant storage tank (1) into the air conditioning unit according to the control instruction, or stopping adding the refrigerant in the refrigerant storage tank (1) into the air conditioning unit according to the control instruction.
2. A refrigerant filling apparatus as recited in claim 1, wherein said apparatus further comprises:
a second temperature sensor (5) for detecting an outdoor ambient temperature;
a third temperature sensor (6) for detecting an indoor ambient temperature;
the controller (3) is further configured to calculate the target exhaust temperature based on the outdoor ambient temperature and the indoor ambient temperature.
3. Refrigerant filling apparatus as claimed in claim 2, wherein said controller (3) is further configured to calculate said target discharge temperature from said outdoor ambient temperature and indoor ambient temperature using a preset fitting function.
4. A refrigerant filling apparatus as recited in claim 1, wherein said apparatus further comprises:
a first pressure sensor (7) for detecting a first pressure within the refrigerant storage tank (1);
the controller (3) is also used for judging whether the first pressure is in a preset range.
5. The refrigerant filling apparatus as recited in claim 4, further comprising: a display (8);
and when the first pressure is not in the preset range, the controller (3) is also used for controlling the display (8) to display corresponding warning information.
6. The refrigerant filling apparatus as recited in claim 4, further comprising: a booster pump (9);
a second pressure sensor (10) for detecting a second pressure at the filling point of the air conditioning unit;
when the first pressure is not more than the second pressure, the controller (3) is also used for starting the booster pump (9) to increase the pressure of the refrigerant added into the air conditioning unit.
7. Refrigerant filling device according to claim 1, wherein said first temperature sensor (2) is arranged on an outer wall of an outdoor unit discharge pipe of said air conditioning unit.
8. A method of refrigerant charging, the method comprising:
detecting an actual discharge temperature of the compressor;
and adding a refrigerant into the air conditioning unit according to the target exhaust temperature and the actual exhaust temperature, or stopping adding the refrigerant into the air conditioning unit according to the target exhaust temperature and the actual exhaust temperature.
9. A refrigerant charging method as set forth in claim 8, further comprising:
detecting an outdoor ambient temperature and an indoor ambient temperature;
and calculating the target exhaust temperature according to the outdoor environment temperature and the indoor environment temperature.
10. A refrigerant charging method as set forth in claim 8, further comprising: it is determined whether a pressure in a refrigerant storage tank supplying the refrigerant is within a preset range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911298636.8A CN111023412A (en) | 2019-12-16 | 2019-12-16 | Refrigerant filling device and method |
Applications Claiming Priority (1)
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